Aside from the altruistic aspect, I had extra motivation to give blood from an unfounded pet theory that the body isn't capable of removing all bad products tha

Aside from the altruistic aspect, I had extra motivation to give blood from an unfounded pet theory that the body isn't capable of removing all bad products that ends up in the bloodstream. Giving blood seemed like a safer way to purge some of these products than diy at-home phlebotomy. It's nice to finally have some research supporting this guess.